Manufacture of solenoid or other electric coils.



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MANUFACTUBE OF SOLENOID OR OTHER ELECTRIGOOILS.

(Appncasin mea Feb. 1s, 1901.)

(No Modal.)

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UNDf/STATES TETERfHEANYDEVELOPING COM TON,- yWESTJVIRGFINIA.- j

JoH'NfA. ,BEAN-Y, or PHILADELPHIAPENNSYLVANIA, AssIeNoR To THE f PANYorsAME PLAGE 'AND cHARLEsy`MANUFATURE OFfsioLi-:Nom ou'. ofi-HER l-:LlcrnlcfcolLs. l

SPECIFICATION forming part of Letters Patent No. 673,521, dated May 7, 1901i Application led February'l, 1901. Serial No. l$7,725. (No model.)

"To all whom it may concern.:

Be it known that I, JOHN A. HEANY, acitizen of the United States, residing atthe city of Philadelphia,in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements'in theY Manufacture of Solenoid or other Electric Coils, of which the following is a specification. Myinvention has relation to the manufacture of windingsfora spool or coil to be'used for electromagnets, ysolenoids, and the like; and in such connection it relates to the'construction and arrangement of such a winding.

By my present invention the wire, uncovered ornaked, is laidfn'pon'the spool spirally and properly spaced. The wire is Wound tightly upon a sheet or layer of asbestos or similar non-combustible insulating material, so as to preferably sink or embed itself to a more or less ,extent in said sheet, and then the spaces between the wire coils, as well as the exposed surface of the wire itself, are completely iilled and covered with a paste or cement consisting of a non-combustible, iusulating, and waterproof mixture, the principal ingredients of which are a suitable oxid and sodium silicate or its equivalent as a binding agent,which mixture readily hardens and unites or cements with the wire and under heat will not be dissipated, peel, or crack off from the wire or lose its other 'characteristic properties.

The nature and scope of my invention will be more fully understood from the following description, taken in connection with the accompanying drawing, forming part hereof, which illustrates in plan View, partly broken away and partly sectioned, a spool or coil embodying the main features of my invention.

Referring to said drawings, @represents the spool of a solenoid-coil, and a its tubular axis, upon which the coil is to be wound.

In carrying out my invention there is first laid around the Vaxis d a sheet or layer h of asbestos or similar non-combustible insulating material.- Upon this sheet or layer b is then spirally wound a bare or uncovered Wire d to constitute a Section of the solenoid-coil. This Vwire d is wound upon the layer h, preferably with sufficient tightness or tension as covered with a paste or cement e.

or`cement e consists of Va mixture which 1ead.

spaced, so that the wire cl will not cross itself or the coils of the spiral contact. ,After the wire d of one Section is wound upon the layer h the spaces between its coils, as well as the bare'periphe'ry of the'wire hare filled and This paste ily hardens, and when hard is non-combustible, impervious to moisture, and forms a good-insulation for the Wire d. It also adheres strongly to the wire and forms a coating which will not peel or chip off, will not disintegrate, and will not lose its non-com bustible, Waterproof, and insulating qualities Vwhen subjected to heat, whether it be heat generated in the wire itself \by the passage of the current or generated from an external source. A preferred` mixture contains sodium silicate as a binding agent with a metallic oxid, such as manganese oxid added thereto, as a base'and the whole formed into a Viscous or semiluid mass. The cement e may be applied with a brush or any suitable instrument. When one layer orsection of the coil has been laid upon the spool and Wound, say, from right to left, one endthe inlet end of the Wire-projects from anend of the spool. is next built up in preferably the manner before stated-namely, a sheet or layer b is laid on top of the cement coating e, the wire CZ is then wound upon the layer b, and then coated and covered by cement e. The wire d, forming the second coiled section, isa cont-inuation The second section of the coilv of the wire forming the first section; but the second coiled section is wound in a direction reversely to that of the first section--that is, f

the axis o.' of the coil always turns in the same direction; but the wire d is firstfed from right to left toA form the first section and then from left to right to form the second section, and so the second section reversely to the first section insures the passing of the Wires of the IOO rriedout, 'd vare laid uponthe spool. j Having thus-described the nature and obj second .sectionfdiagolly oventhe wire o the -rst .section andr p1"'\v'en'ts,vtherefore;Y th

coils off-either lsection being forced into'the .This preferred manner of construction is cam-Y no matter hoW many sectionsofgwlre ject `of my invention', A`what `-I clai'uijv as newgj and desire yto secure by LettersPatent, is

1; ln a s poolor coil for electromajgnets and,` the like,v a coil-section 'of4 baitewire-fwoiind upon a sheet or layerof no ncombustible ini-'- sulatting-lnaterial and a 'cement covering 'the hare periphery of lthe' Wire sind completely tillingthe spacesibetweeu the :coils of the sec-y ti on,said cement consistingof a mixture which is non-combustible, impervious to lmoisture and insulating and adapted to firmly adhere to the wire under all Variations of temperat-4 ture.' x 2. In a, spool or coil for electromagnets and insulating cement, seid cement adapted "to lcover lthe bare Wire and to'rmly adhere thereto and to enter the spaces between the coils of said wire.

l. Vupon a sheetjor leyeljofgasbes'tos 'or itsj,equiw-k space between the coils oftheothep section.

'bed the coils iin said sheet orla'yer; anden'on Iter the spacesV between oeils conjunctioniwiththe "sheetor propervspacing'of said cfoilsiV 1 Y l sheets' of 'sb'esto's' or eqivletmterial, alv-terimte coil-"sections h'eing wound reversely Y l o f one section diagonally/ cross thecoilsof a;

betweenfthecoils ofsa'id sectiomv f f the like, a coil of bare Wire embedded` between l a sheet or layerof `asbestos or its equivalent y1 and a' non-combustible, moisture-.proof `sind 1 Witnesses:

J. WALTER DoUGLAss, THOMAS M. SMI'LH.`

lentfunder tension suficientto, pa11ftiallyfe m 'Ombtiblf@Piswfrpiof" ent adaptedgtoc'oinpleiel mai-ningimepm 4; A ispofo'i or een f slermgn 160m prising a series of 's uperposed coil-sectio1 1s, each ysection inclosed Abetiyveen two layers. o r

upon the preceding sectionV so vthat the coils 'adjacent section,r and a paste or cement iiiti'aj'r,V

posed bet- Ween the layers of asbestos- ,inclos ing eachv section and adapted to Iill the In testimony whereof 'I have hereunto set l stndige spaces' f JOHN A.y I'iiiAlJY.: 

